Lettering-pen.



E. S. KEENE.

LETTERING PEN.

APPLICATION FILED SEPT. 15. 1911.

l 1,590 Patented. July 9, 1918.

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2M 4 l Vanna C] not no a EDWARD S. KEENE, OF AGRICULTURAL CQIiLEG-E, NORTH DAKOTA.

LETTERING-PEN.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed September 15, 1917. Serial No. 191,568.

To all whom it may concern:

Be it known that I, EDWARD S. KEENE, a. citizen of the United States, residing at Agricultural College, county of Cass, and State of North Dakota, have invented certain new and useful Improvements in Lettering-Pens, of which the following is a specification.

The present invention is an improvement on the lettering-pen of my Patent No.

1 1,158,230, October 26,1915.

The lettering-pen of the present invention which is adapted for lettering drawings, posters, notices, and other work requiring heavy lines, embodies a novel point or nib which distributes the ink in a unique fashion. The embodiment of the invention hereinafter set forth and which is shown in the drawings is susceptible of modification and is to be considered as illustrative, rather than restrictive, of the scope of the invention.

In the accompanying drawings:

Figure 1 is a longitudinal section;

Fig. 2 is a detail plan view of the nib and point; and I Fig. 3 is a detail view looking at right angles to the outer face of the lip 13.

The pen holder 1 may be of any desired shape and any length. Secured to the pen holder by any means, such as a screw 2, is a shell 3 which has an annular flange 1 at its outer end, a rotatable, milled coupling 5 loosely embracing the flange el and being internally screw threaded at (3. The nib 7 is provided with a screw threaded part 8 det-achably en aged with the screw threads 4 of the coupling 5 and provided with a conical valve seat 9.

The point consists of upper and lower pieces 10 and 11 of flat, elastic material, preferably of metal. These pieces are entered in kerfs 12 in the nib 7.

The outer end of the piece 10 is turned upwardly at an angle as shown'at 13. The extreme forward ed e of the piece 11 bears on the underside o the piece 10, along a straightline at 14 to form a cleft through which the ink feeds for distribution to the surface which is being written upon. The point of contact 14, is substantially at, or slightly rearwardly, of the ridge or crest at the angle of the parts 10, 13. The piece 11 is bent or arched so that a portion of the length thereof will form a pocket 16 which tapers from its widest point to the point of distribution 14. When writing, the pressure applied by the contact of the lip 13 with the surface being written upon, determines the flow of ink at the cleft 14 and the thickness of the ink and its distribution over the lip. Consequently, the line will bev of uniform width and its thickness under the control ofthe operator. The principle of operation of the point is the use of two parts, comprising a point, which are of unequal length, so that one projects beyond the other; hence, there is produced a uniform flow of ink over the marking surface and the ink is admitted to the point in only a part of its circumference. When the point is pressed on the surface to be written upon, the lip 13 is tilted upward at its outer edge to permit the; ink to flow in a uniform mark equal. to thediameter of the point.

Fitting within the shell 3 is a tubular reservoir 17 whose forward end is tapered at 18 at an angle corresponding to the concavity 9 and fitting tightly, yet removably, in said concavity. The reservoir has a filling opening 19 which registers with an opening 20 in the shell 3. On the shell 3 is a tubular sleeve 21 which covers the openings 19, 20, and is held by frictional engagement with the shell so that no leakage of the ink from the reservoir can occur. A soft or flexible rubber nipple 22 is. fitted around the reduced end 23 of the reservoir and closes that end. The valve stem 2-1 passes through an opening in the nipple 22 and is so snugly engaged by the nipplethat leakage of the ink backwardly into the shell 3 can not'occur. The valve 25 is adapted to fit the concavity 9 to cut off feed from the reservoir to the space 16. Secured to the stem 24 is a plunger 26 which is slidable against the interior of the shell 3 and provided with a beveled or tapered portion 27 A leaf spring 28 is secured on the outside of the shell 3 by the screw 2 and another screw 29 and carries in its bent end a screw 30 having a fiat head and a conical tip 31, the latter bearing on the tapered part 27. The screw and the end of the spring operate in an opening 32 in the shell 3. A coil spring 33, located in the shell 3, bears against the plunger 26 and the holder 1, said spring being adapted to press the plunger and the valve and tends to keep the valve snugly seated in the concavity 9.

When pressure is applied to the head of the screw 30, the tip 31 by its engagement with the beveled portion 27, forces back the i plunger and unseats the valve 25, thus allowing ink to feed to the space 16. When pressure is released, the spring 33 closes the valve. The screw 30 is placed so that the finger of the user can be readily applied at any moment while using thepen.

Having thus described my invention, what I claim as new and desire to'secure by Let- 'ters' Patent is 1. In a lettering-pen, a'point com rising members one of which has an upward y bent or angularly arranged portion, the other member having its end contacting with the first member rearwardly of the end of the upwardly bent or angular portion.

2. In a lettering pen, a point comprising members, one of which has an upwardly bent or angularly arranged tip, the other member having its end contacting with the first member in the region of the apex of the angle of the upwardly bent portion with the body of the first-named member.

3. In a letteringn, a point comprising two members of su stantially flat material which are arranged at an angle to each other to form a chamber 'therebetweem the tip of one member extending upwardly in bent or angular relation thereto, said member engaging the end of the other member.

In testimony whei-eofllhereunto afiix my signature.

I EDWARD S. KEENE. 

